Chevrolet 2000 Cavalier Owner's Manual page 252

While refueling, hang the tethered cap inside the fuel
door by placing the fuel cap strap in the strap hanger.
To remove the cap, turn it slowly to the left
(counterclockwise). The cap has a spring in it; if you let
go of the cap too soon, it will spring back to the right.
6-6
CAUTION:
If you get gasoline on yourself and then something
ignites it, you could be badly burned. Gasoline
can spray out on you if you open the fuel filler cap
too quickly. This spray can happen if your tank
is nearly full, and is more likely in hot weather.
Open the fuel filler cap slowly and wait for any "hiss"
noise to stop. Then unscrew the cap all the way.
Be careful not to spill gasoline. Clean gasoline from
painted surfaces as soon as possible. See "Cleaning the
Outside of Your Vehicle" in the Index.